The product series is suitable for distribution lines with rated voltage of 400V and below. The main function is to protect the electrical circuit against ground fault, prevent ground fault current from causing equipment and electrical fire accidents, and also provide indirect contact protection against personal electric shock. In addition, the residual current relay also has normal operation, fault tripping and residual current indication functions, which can display the operating status of the residual current relay at any time.
This manual provides the working conditions, structure, principle of operation and technical parameters for the RDJD series residual current relays. It also details the installation requirements, wiring diagrams and ordering information for use in distribution circuits up to 400 V.
The document includes step‑by‑step procedures for testing, regular maintenance, fault analysis and replacement, as well as safety guidelines and warranty terms for professional installation and service personnel. This manual is written in Chinese.
| Rated residual operating current (I△n) | 300 mA / 400 mA |
|---|---|
| Rated voltage (Un) | 380 V |
| Rated frequency | 50 Hz |
| Rated current (In) | 250 A / 400 A / 630 A |
| IP protection class | IP40 |
| Electrical life (AC‑15) | 60 000 operations |
| Mechanical life | 300 000 operations |
| Breaking time (Ft) | ≤ 0.2 s |
The relay can be set to a residual operating current of either 300 mA or 400 mA.
The enclosure has an IP40 rating for the wiring terminals.